Solve the equation 5 x + 7 = 5 sech x Give each answer in the form where is a…

MATHEMATICS · Subjective · A Level · Mathematics · Exponentials and logarithms · Exponentials and logarithms

Problem

Solve the equation

5 \tanh x + 7 = 5 \operatorname{sech} x

Give each answer in the form

\ln k

where

k

is a rational number.